<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
    body{
        background-color: rgb(137, 138, 139);
    }
        .column1{
            width: 200px;
            height: 100px;
            background-color: aliceblue;
        }
        .column2{
            width: 200px;
            height: 100px;
            background-color: aqua;
        }
        .column3{
            width: 200px;
            height: 100px;
            background-color: antiquewhite;
        }
        .column4{
            width: 200px;
            height: 100px;
            background-color: blue;
        }
        .column5{
            width: 200px;
            height: 100px;
            background-color: blueviolet;
        }
        .column6{
            width: 200px;
            height: 100px;
            background-color: brown;
        }
        .frist{
            width: 100%;
            height: 300px;
            display: grid;
            grid-template-columns: 200px 200px 200px;
        }
        .second{
            width:100%;
            height: 300px;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }
        .second2{
            width:100%;
            height: 200px;
            display: grid;
            grid-template-columns: 1fr 2fr 3fr;
            column-gap: 24px;
            row-gap: 20px;
        }
        .thrih{
            width: 100%;
            height: 700px;
          
           
        }
        .header{
            width: 600px;
            height: 50px;
            background-color: chocolate;
            grid-area: header;
        }
        .aside{
            width: 100px;
            height:500px;
            background-color: yellow;
            grid-area: aside;
        }
        .main{
            width: 500px;
            height: 500px;
            background-color: violet;
           grid-template: main;
        }
        .footer{
            width: 600px;
            height: 100px;
            background-color: springgreen;
           grid-area: footer;
        }
       
   
        .thrih{
            width: 820px;
            height: 600px;
            display: grid;
           grid-template-columns:100px ;
            grid-template-rows: min-content fr min-content;
            grid-template-areas: 
            "header header header "
            "aside main main"
            "footer footer footer";
            


        }
    </style>
</head>
<body>
    <div class="frist">
        <div class="column1">1</div>
        <div class="column2">2</div>
        <div class="column3">3</div>
        <div class="column4">4</div>
        <div class="column5">5</div>
        <div class="column6">6</div>
    </div>
    <div class="second">
        <div class="column1"></div>
        <div class="column2"></div>
        <div class="column3"></div>
        <div class="column4"></div>
        <div class="column5"></div>
        <div class="column6"></div>
    </div>
    <div class="second2">
        <div class="column1"></div>
        <div class="column2"></div>
        <div class="column3"></div>
        <div class="column4"></div>
        <div class="column5"></div>
        <div class="column6"></div>
    </div>
    <div class="thrih">
        <div class="header">
            头部
        </div>
        <div class="aside">侧边栏</div>
        <div class="main">内容</div>
        <div class="footer">底部</div>
        
    </div>
</body>
</html>